import string

s = input('请输入字符串:\n')
# 初始化
letters = 0
space = 0
digit = 0
other = 0
i = 0
while i < len(s):
    c = s[i]
    i = i + 1
    # 当c.isalpha为真时，letters = letters + 1
    if c.isalpha():
        letters += 1
    elif c.isspace():
        space += 1
    elif c.isdigit():
        digit += 1
    else:
        other += 1
print('字母 = %d, 空格 = %d, 数字 = %d, 其他字符 = %d' % (letters, space, digit, other))
